From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#26201: No notification of cache misses when downloading
	substitutes
Date: Tue, 21 Mar 2017 17:43:29 +0100
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	Geerinckx-Rice's message of "Tue, 21 Mar 2017 04:57:09 +0100")
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To: Tobias Geerinckx-Rice <me@tobias.gr>
Cc: 26201@debbugs.gnu.org, dian_cecht@zoho.com

Hello!

Tobias Geerinckx-Rice <me@tobias.gr> skribis:

> Oh, OK. I'm not an expert on how Hydra's set up these days, but will
> assume it's not too different from my own (a fast nginx proxy_cache,
> mirror.hydra.gnu.org, in front of a slower build farm, hydra.gnu.org).

I think there=E2=80=99s room for improvement in our nginx config at
<https://git.savannah.gnu.org/cgit/guix/maintenance.git/tree/hydra/nginx/mi=
rror.conf>.

For instance, I just discovered =E2=80=98proxy_cache_lock=E2=80=99 while lo=
oking at
<http://nginx.org/en/docs/http/ngx_http_proxy_module.html>; looks useful
in reducing load on hydra.gnu.org.  Surely there are other ways to tweak
caching.

Besides, I=E2=80=99d like to use =E2=80=98guix publish=E2=80=99 on hydra.gn=
u.org.  I suspect
it=E2=80=99s going to be faster than Starman (the HTTP server behind Hydra)=
, and
also it uses an in-process gzip by default, as opposed to bzip2 which is
what Hydra uses (better compression ratio, but super CPU-intensive).

At any rate, clients should not paper over server-side performance
issues IMO.

Thanks,
Ludo=E2=80=99.